ZGR SOLAR STR 250
Operation manual
www.zigor.com
9
Blue
Always on
Bluetooth communication is connected.
Flicker
Bluetooth communication is not connected.
Yellow Always on
Low insulation resistance
.
Off
Normal insulation resistance
.
Red
Slow
ü
icker
Low-level alarm
.
Fast
ü
icker
Middle-level alarm
.
Always on
High-level alarm
.
Green Always on
In maintenance
.
Off
No abnormal state
.
Table 2-3 LED Lamp description
Internal architecture of ZGR SOLAR STR 250
2.4
The simplified scheme of the internal architecture of
ZGR SOLAR STR 250
is show in Fig. 2-6. The MPPT is
utilized for DC input to ensure the maximum power from the PV array at di
û
erent PV input conditions. The
inversion circuit converts the DC power into AC power and feeds the AC power into the utility grid through the AC
terminal. The protection circuit is equipped to ensure the safe operation of the device and personal safety.
The installation and connection of the
ZGR SOLAR STR 250
to the electrical network must be subject to current
local regulations and may require the installation of suitable electrical consumption measurement devices.
Fig. 2-6 Simplified scheme of ZGR SOLAR STR 250 inverter
The DC switch is used to disconnect the DC current safely whenever necessary. The
ZGR SOLAR STR 250
is
equipped with four DC switches; each DC switch controls its corresponding DC terminals.
Fig. 2-7 DC switch
NOTE:
Turn the DC switches to the ON position before restarting the inverter.
